Large-Amplitude nonlinear stability results for atmospheric circulations

M. J. P. Cullen, Robert J. Douglas

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

7 Dyfyniadau(SciVal)


It is shown how large-amplitude stability results for flows governed by potential-vorticity conservation can be obtained by geometric arguments using rearrangements of functions. The method allows for non-smooth solutions, and also gives a framework for the rigorous treatment of the effects of mixing by increasingly fine-scale filamentation. It is, thus, different from the energy-Casimir method. It is applied to the semi-geostrophic shear-flow problem in a channel, where the results can be compared with other methods. It is shown that, under the definitions used, there are no non-zonal nonlinearly-stable states in this problem. In the baroclinic case, it is shown how potential-vorticity conservation reduces the available energy for the transient flow. Copyright © 2003 Royal Meteorological Society
Iaith wreiddiolSaesneg
Tudalennau (o-i)1969-1988
Nifer y tudalennau20
CyfnodolynQuarterly Journal of the Royal Meteorological Society
Rhif cyhoeddi591
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - Ebr 2003

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